Added example of common mistake people have with do whiles (#20375)
Added example of common mistake people have with do whiles (#20375)


BhaveshSGupta/FreeCodeCamp,HKuz/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,raisedadead/FreeCodeCamp,jonathanihm/freeCodeCamp,FreeCodeCamp/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,HKuz/FreeCodeCamp,raisedadead/FreeCodeCamp,jonathanihm/freeCodeCamp,BhaveshSGupta/FreeCodeCamp